What concepts describes the reason that atoms are larger and ionization energies are lower as you go down the periodic table?
Many factors influence these phenomena. However, a large factor is:
The effective nuclear charge of atoms dictates the Coulombic attraction strength regarding electrons and protons.
The way I was taught was the positive charge of the nucleus, although increasing, is increasingly "screened" as the equivalent number of core electrons screen the charge.
As a result, the valence electrons becomes increasingly diffuse, which increases the overall atomic radius and ease of ionization.
Here's an analogy my general chemistry text describes,
As the level of "frost" (core electron screening) on the glass increases, the observer sees less and less light emission (the valence electrons experience less and less Coulombic attraction).
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The concept that describes why atoms are larger and ionization energies are lower as you go down the periodic table is the increase in the atomic size and the shielding effect of inner electrons.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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